1991-2020 Degrees Fahrenheit 1 65.9 70.7 -4.8 10 104 1928 1956 1915 1914 bottom-tenth 2 61.5 65.1 -3.6 14 99 1915 1934 1915 1914 bottom-third 1920 3 56.1 59.8 -3.7 11 101 1995 1934,2012 1915 1914 bottom-tenth 1982 4 53.1 55.3 -2.2 30 82 1915 2012 1915 1914 bottom-third 1927,1935 5 49.0 50.7 -1.7 38 73 1915 2012 1915 1911 normal 1950,1961 6 43.9 47.3 -3.4 11 99 1915 2012 1915 1914 bottom-tenth 1922,1957,1982 7 41.6 44.9 -3.3 8 101 1915 2012 1915 1897 bottom-tenth 1920 8 41.5 44.2 -2.7 17 92 1917 1934,2012 1915 1897 bottom-third 9 42.8 45.1 -2.3 18 91 1917 1934,2012 1915 1916 bottom-third 1969 10 44.7 47.1 -2.4 11 96 1917 1934 1915 1916 bottom-tenth 1949 11 46.6 49.5 -2.9 6 101 1917,1993 1934 1915 1916 bottom-tenth 1973 12 48.4 51.7 -3.3 5 102 1993 2012 1915 1915 bottom-tenth 1915 18 46.2 50.3 -4.1 1 106 1916 2016 1916 1915 lowest 24 48.4 51.7 -3.3 2 103 1917 2017 1916 1916 bottom-tenth 36 -99 51.7 -99 -99 -99 1917 2017,2018 normal 48 -99 51.7 -99 -99 -99 1918 2018 normal 60 -99 51.7 -99 -99 -99 1930 2006 normal